Adsorption of arsenic (V) by iron (III)-modified natural zeolitic tuff |
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| Authors: | Tanja Stani? Aleksandra Dakovi? Aleksandar ?ivanovi? Magdalena Toma?evi?-?anovi? Vera Dondur Sonja Mili?evi? |
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| Institution: | (1) Institute for Technology of Nuclear and Other Mineral Raw Materials, P. O. Box 390, 11000 Belgrade, Serbia;(2) VMA Institute for Hygiene, Crnotravska 17, 11000 Belgrade, Serbia;(3) Faculty of Physical Chemistry, P. O. Box 137, 11000 Belgrade, Serbia |
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| Abstract: | Adsorption of arsenic (V) by natural zeolitic tuff, modified with iron (III), was investigated. Also, the iron (III) adsorption
characteristics by natural zeolitic tuff was evaluated. It was determined that iron (III) adsorption by starting zeolitic
tuff was best represented by the Freundlich type of isotherm, having correlation coefficient (r
2) of 0.990. Arsenic (V) adsorption by iron (III)-modified zeolitic tuff followed a nonlinear type of isotherm. The best fit
of the experimental data was obtained using the Langmuir–Freundlich model (r
2 = 0.99), with the estimated maximum of arsenic (V) adsorption to iron (III)-modified zeolitic tuff of 1.55 mg/g. |
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